洞口对带纵向加强肋复合墙体竖向受力性能影响

Influence of the Hole on the Vertical Force Performance of the Composite Wall with Longitudinal Rib Reinforcement

设计并制作2榀1/2比例开洞(分别为窗洞和门洞)带纵向加强肋复合墙体进行竖向承载力静力试验,分析带洞口墙体在竖向荷载作用下的受力特点、破坏模式和钢筋应变变化规律,并与不开洞的带纵向加强肋复合墙体进行对比。考虑洞口位置和洞口大小变化的因素,建立墙体数值模型计算墙体的竖向承载力,对比不同开洞位置和洞口率对墙体竖向承载力的影响程度。结果表明:开门洞墙体边框柱与暗梁连接角部混凝土压碎而破坏,开窗洞墙体洞边肋柱中纵筋压屈而破坏;与不开洞墙体极限竖向承载力相比,开门洞墙体的承载力未明显降低,开窗洞墙体降低较明显;洞口率相较洞口位置变化对墙体竖向承载力影响更显著。

Design and manufacture one piece of the 1/2 ratio longitudinal reinforcing rib composite wall with opening the window hole and one piece of the 1/2 ratio longitudinal reinforcing rib composite wall with opening the door hole for vertical bearing capacity static test, and analyze the stress characteristics, failure mode and steel strain change of the wall with the hole under vertical load, and compared with one piece of the 1/2 ratio longitudinal reinforcing rib composite wall without opening hole. Considering the factors of the location of the opening and the size of the opening, a numerical model of the wall is established to calculate the vertical bearing capacity of the wall, and the influence degree of different opening positions and opening ratio on the vertical bearing capacity of the wall is compared. The results show that:The frame column and the hidden beam connecting the corner of the wall with opening the door hole are crushed and destroyed, and the hole boundary rib column of longitudinal reinforcement of the wall with opening the window hole are buckling damaged;Compared with the ultimate vertical bearing capacity of the wall without opening hole, the bearing capacity of the wall with opening the door hole is not significantly reduced, and the wall with opening the window hole is significantly reduced;The hole mouth rate is more significant than the hole position change on the vertical bearing capacity of the wall.